Dental composite resin is a tooth-colored restorative material used to replace a decayed portion of the tooth structure. Its esthetic appearance is the main advantage over conventional dental amalgam. Typical composite resin is composed of a resin-based matrix, such as bisphenol A-glycidyl methacrylate, and inorganic filler like silica.
Composite resin has been used for nearly 50 years as a restorative material in dentistry. The use of this material has recently increased as a result of consumer demands for esthetic restorations, coupled with the public's concern with mercury-containing dental amalgam. Composite is now used in over 95% of all anterior teeth direct restorations and in 50% of all posterior teeth direct restorations. Carbon fiber reinforced composites have been developed for use as dental implants. In medicine, fiber-reinforced composites have been used in orthopedics as implants, osseous screws, and bearing surfaces. In addition, hydroxyapatite composite resin has become a promising alternative to acrylic cement in stabilizing fractures and cancellous screw fixation in elderly and osteoporotic patients. The use of composite resin in dentistry and medicine will be the focus of this review, with particular attention paid to its physical properties, chemical composition, clinical applications, and biocompatibility.
Advantage：
1. Composite resins can be used as dental fillings to fill decayed teeth, or they can be used on tooth surfaces to repair cracked teeth. And can be used to close gaps between teeth and create composite veneers.
2. Composite resin is very beautiful. The composite resin can be customized to match the color of the patient's teeth and blend in with the natural teeth.
3. The reason composite resin restorations do not require as much drilling is that the composite resin can create a strong bond with the enamel, which means fewer chances to the natural tooth structure. In addition to requiring less drilling, this also means that more of the natural tooth structure is preserved.
4. Composite resins can be used to isolate teeth and reduce the frequency and severity of tooth sensitivity.
5. Saves time and cost for the patient, it can be done in the patient's mouth and does not need to be manufactured in a dental laboratory. Composite restorations can be repaired without requiring complete replacement.
